Floor element with guiding means

ABSTRACT

Floor element ( 1 ), which is mainly in the form of a board with triangular, quadratic, rectangular, rhomboidal or polygonal shape as seen from above. The floor element ( 1 ) is provided with edges ( 2 ), a lower side ( 7 ) and a decorative upper layer ( 3 ). The floor elements ( 1 ), which are intended to be joined via tongue and groove are on at least two opposite edges ( 2 ), preferably on all edges ( 2 ) provided with holes ( 4 ). The holes ( 4 ) extends inwards from the edge ( 2 ) mainly parallel to the decorative upper layer ( 3 ). The holes ( 4 ) are arranged on a predetermined distance from the decorative upper layer ( 3 ) and on a predetermined distance from a closest corner between two adjacent edges ( 2 ), whereby the holes ( 4 ) are intended to receive each one part of a guiding means ( 6 ).

This application has been filed under 35 USC § 371, claiming priorityfrom PCT/SE00/01385, filed on Jun. 30, 2000, which claims priority fromSE 9920559-5, filed on Jul. 5, 1999.

The present invention relates to floor elements which are joined bymeans of tongue, groove and separate guiding means.

Prefabricated board shaped floor elements which are provided with tongueand groove at the edges are common nowadays. They are very easy toinstall whereby this can be accomplished by the average handy man. Suchfloor elements can, for example, be made of solid wood, fibre board orparticle board. These are most often provided with a surface layer suchas a lacquer or some type of laminate. The boards are most ofteninstalled by being glued together via tongue and groove. This type offloor is usually installed so that the boards overlap and thelatitudinal joint do not coincide. It has therefore not been any reasonto guide the relative longitudinal position between the boards. Designedinstallations is very difficult to achieve without this possibility. Oneexample where it should be desirable to have coinciding latitudinal aswell as longitudinal joint is completely quadratic floor elements. Thisis very difficult as scales or a very sure eye and great workman skillsis required if a successful end result is to be achieved. It isfurthermore very easy to dislodge already installed floor elements wheninstalling new ones. It is also sometimes desired to have latitudinaljoints coincide over, for example, every other or every thirdlatitudinal joint, when installing with overlap.

This requirement is foremost present when floor boards with dissimilardecor is used for creating a decorative effect on larger floor surfaces.This requirement goes for quadratic as well as rectangular floorelements.

It has, through the present invention, been made possible to solve theabove mentioned problems, whereby a designed floor installation, evenwith complex patterns, easily can be installed with great accuracy, evenby the average handyman. Thus, the invention relates to floor elementswhich are mainly in the form of boards with triangular, quadratic,rectangular, rhomboidal or polygonal shape as seen from above. The floorelements are provided with edges, a lower side and a decorative upperlayer. The floor elements are intended to be joined by means of tongueand groove. The invention is characterised in that the floor elementsare provided with holes in at least two opposite edges, preferably allfour edges, which holes extends inwards from the edge mainly parallelwith the upper layer. The holes arc arranged at a predetermined distancefrom the upper decorative layer and at a predetermined distance from theclosest edge between two adjacent edges. The holes are intended toreceive one part of a guiding means each.

The holes preferably extends perpendicular to the edge where the holesare arranged. Alternatively, the holes extends parallel to the edgewhich is adjacent to the edge where the holes are arranged. In caseswhere the corners of the floor boards are right-angled the holespreferably extends perpendicular to the edge where they are arranged andparallel to the edge which is adjacent to the edge where they arearranged.

According to one embodiment of the invention the floor element has fouredges with the same length. Each edge is suitably provided with each onehole group of two holes. The holes have, in each hole group, beenarranged on a mutual distance of N from each other and that the distancebetween a hole and its closest edge is N/2, whereby the length of theedge is 2N.

According to a second embodiment of the invention the floor element hastwo opposite edges with larger length than the two remaining edges. Thetwo shorter edges are suitably provided with each one hole group of twoholes. The holes have, in each hole group, been arranged on a mutualdistance of N from each other and that the distance between a hole andits closest edge is N/2, whereby the length of the edge is 2N. The twolong side edges are provided with each one, hole group of three or moreholes of which the outermost are arranged on a distance of L/2from theclosest edge while the distance between two adjacent holes arranged onthe long sides is L, whereby the length of the long side edge is aninteger larger than 3L, preferably smaller than 30L.

The two long side edges are alternatively provided with each one holegroup of three or more holes, of which the outermost holes are arrangedon a distance of L/2from the respective closest corner between twoadjacent edges. The distance between two adjacent holes arranged on thelong side edge is L, 2L, 3L, 4L, 5L or combinations thereof. The lengthL is in both cases suitably equal to the length N.

The holes are suitably provided with an inner, gripping edge. The holesare thereby suitably provided with an inner gripping edge by milling agroove from the lower side. This groove is then suitably perpendicularto the hole and thereby parallel to the edge where the hole, which isintersected by the groove, is arranged. The hole may alternatively beprovided with an inner gripping edge by milling a step with largerdiameter than the hole, on a predetermined depth.

The guiding means are then suitably provided with each two ends whicheach are provided with one or more resilient projections. Theseprojections are intended to interact with the gripping edges of theholes.

The invention is further illustrated by means of enclosed figuresshowing different embodiments of a flooring material according to thepresent invention whereby,

FIG. 1a shows, seen from above, an embodiment of a floor element 1 witha quadratic surface.

FIG. 1b shows the embodiment from FIG. 1a showed from the side.

FIG. 2 shows, seen from above, a second embodiment of a floor element 1with a rectangular surface.

FIG. 3 shows, seen from above, yet another embodiment of a floor element1 with a rhomboidal surface.

FIG. 4 shows, seen from above, yet another embodiment of a floor element1 with a hexagonal surface.

FIG. 5 shows, seen from above, yet another embodiment of a floor element1 with a rectangular surface.

FIG. 6 shows, seen from above an embodiment of the invention wherequadratic floor elements 1 according to FIG. 1 and rectangular floorelements 1 according to FIG. 5 together forms a so-called designedinstallation.

FIG. 7 shows, seen from above, an embodiment of the invention wherequadratic floor elements from FIG. 1 forms a so-called designedinstallation.

FIG. 8 shows, seen from above, an embodiment of the invention whererectangular floor elements according to FIG. 2 forms a so-calleddesigned installation.

FIG. 9 shows, seen from above an embodiment of the invention whererectangular floor elements according to FIG. 5 forms a so-calleddesigned installation.

FIG. 10 shows, seen from above, an embodiment where rhomboidal floorelements according to FIG. 2 forms a so-called designed installation.

FIG. 11 shows, seen from above, an embodiment of the invention whererhomboidal floor elements according to FIG. 2 and hexagonal floorelements according to FIG. 4 together forms a so-called designedinstallation.

FIG. 12 shows, in cross-section, parts of two floor elements 1 and aguiding means 6 according to one embodiment of the invention.

FIG. 13 shows, in cross-section, parts of two floor elements 1 and aguiding means 6 according to a second embodiment of the invention.

FIG. 14 shows, in cross-section, parts of two floor elements 1 and aguiding means 6 according to yet another embodiment of the invention.

FIG. 15 shows, seen from below, parts of the floor element 1 showed inFIG. 13.

Accordingly, FIG. 1a shows, seen from above, an embodiment of a floorelement 1 with a quadratic surface, while FIG. 1b shows the embodimentfrom FIG. 1 as seen from the side. The floor element 1 is provided withedges 2, a lower side 7 and a decorative upper layer 3. The floorelement 1 is also provided with groove 11 and tongue 12. The floorelement 1 is in all edges 2 provided with holes 4, which holes extendsinwards from the edge 2 mainly parallel to the upper decorative layer 3.The holes 4 are intended to receive each one part of a guiding means 6(FIG. 12). The holes 4 extends parallel to the edge 2 which is closestadjacent to the edge 2 where the holes 4 are arranged. The floorelements 1 are on each edge 2 provided with each one hole group of twoholes 3. The holes have, in each hole group, been arranged on a mutualdistance of N. The distance between each hole 4 and its closest cornerbetween two adjacent edges is N/2, the length of the edge is hereby 2N.

FIG. 2 shows, seen from above, a second embodiment of a floor element 1with a rectangular surface. The floor element 1 is provided with edges2, a lower side 7 and a decorative upper layer 3. The floor element 1 isalso provided with groove 11 and tongue 12. The floor element 1 is inall edges 2 provided with holes 4, which holes extends inwards from theedge 2, mainly parallel to the upper decorative surface 3. The holes 4are intended to receive each one part of a guiding means 6 (FIG. 12).The holes 4 extends parallel to the edge 2 which is closest adjacent tothe edge 2 where the holes 4 are arranged. The two shorter edges 2 areeach provided with each one hole group of two holes 4, which holes have,in each hole group, been arranged on a mutual distance of N. Thedistance between each hole 4 and its closest corner between two adjacentedges is N/2. The length of the edge is hereby 2N. The two longer edgesare provided with one hole group of five holes 4 each. The outermostholes has been arranged on a distance L/2 from its respective closestedge 2 while the distance between two adjacent holes 4, on the twolonger edges 2, is L. The length of the longer edge 2 is thereby 5L. Thelength L is equal to the length N.

FIG. 3 shows, seen from above, yet another embodiment of a floor element1 with rhomboidal surface. The floor element 1 is provided with edges 2,a lower side 7 and a decorative upper layer 3. The floor element 1 isalso provided with groove 11 and tongue 12. The floor element 1 is inall edges 2 provided with holes 4, which holes extends inwards from theedge 2, mainly parallel to the upper decorative surface 3. The holes 4are intended to receive each one part of a guiding means 6 (FIG. 12).The holes 4 extends parallel to the edge 2 which is closest adjacent tothe edge 2 where the holes 4 are arranged.

According to an alternative embodiment the holes extends parallel to theedge 2 which is adjacent to the edge 2 where the holes 4 are arranged.This orientation of the holes 4 facilitates certain forms of designinstallations.

The floor clement 1 is on all edges 2 provided with each one hole groupof two holes 4. The holes 4 have, in each hole group, been arranged on amutual distance of N. The distance between each hole 4 and its closestcorner between two adjacent edges is N/2. The length of the edge ishereby 2N.

FIG. 4 shows, seen from above, yet another embodiment of a floor element1 with a hexagonal surface. The floor element 1 is provided with edges2, a lower side 7 and a decorative upper layer 3. The floor element 1 isalso provided with groove 11 and tongue 12. The floor element 1 is onall edges 2 provided with holes 4, which holes 4 extends inwards fromthe edge 2, mainly parallel to the upper decorative surface 3. The holes4 are intended to receive each one part of a guiding means 6 (FIG. 12).The holes 4 extends parallel to the edge 2 which is closest adjacent tothe edge 2 where the holes 4 are arranged. The floor element 1 is on alledges 2 provided with each one hole group of two holes 4. The holes 4have, in each hole group, been arranged on a mutual distance of N. Thedistance between each hole 4 and its closest corner between two adjacentedges is N/2. The length of the edge is hereby 2N.

FIG. 5 shows, seen from above, yet another embodiment of a floor element1 with rectangular surface. The floor element 1 is provided with edges2, a lower side 7 and a decorative upper layer 3. The floor element 1 isalso provided with groove 11 and tongue 12. The floor element 1 is inall edges 2 provided with holes 4, which holes extends inwards from theedge 2, mainly parallel to the upper decorative surface 3. The holes 4are intended to receive each one part of a guiding means 6 (FIG. 12).The holes 4 extends perpendicular to the edge 2 where the holes 4 arearranged. The holes 4 furthermore extends parallel to the edge 2 whichis closest adjacent to the edge 2 where the holes 4 are arranged. Thetwo longer edges 2 are provided with one hole group of eight holes 4each. The outermost holes has been arranged on a distance L/2 from itsrespective closest edge 2 while the distance between two adjacent holes4, on the two longer edges 2, is L and 3L respectively. The length ofthe longer edge 2 is thereby 12L. The length of the shorter edges 2 is2L.

The floor element may also, as shown in FIG. 2, be provided with holes 4on the two shorter edges 2. These edges 2 are then provided with onehole group of two holes 4 each. The holes 4 are then arranged with amutual distance of L. The distance between each hole 4 and its closestcorner between two edges 2 are L/2. The length of the edge 2 is asbefore 2L.

FIG. 6 shows, seen from above, an embodiment of the invention wherequadratic floor elements 1 according to FIG. 1 and rectangular floorelements 1 according to FIG. 5 together forms a designed installation.Tongue 12 and groove 11 is for the matter of clarity not shown. Thequadratic floor elements 1 corresponds completely to the one shown inFIG. 1. The rectangular floor elements 1 correspond mainly with the oneshown in FIG. 5, the two shorter edges are however provided with holes 4which corresponds to the edges 2 of the quadratic floor element 1. Theinstallation can accordingly be initiated by joining five quadraticfloor elements 1 by means of one or two guiding means 6 (FIG. 12) perfloor element so that a rectangular unit is formed. This may then bejoined with a rectangular floor element 1 by means of one or moreguiding means so that a part corresponding to 2L of the longer edge onthe floor element 1 is left free. The quadratic floor elements 1 mayalternatively be joined directly with the rectangular floor element 1without first having to be joined with each other. Another rectangularfloor element 1 is then joined at an angle, with the already joinedfloor elements 1. One or more guiding means are used also here for thepositioning of the floor elements 1. Further quadratic floor elements 1are added to the already installed floor elements 1 until a squareconsisting of twenty-five quadratic floor elements 1 is formed. Anothertwo rectangular floor elements 1 are then assembled at an angle so thatthe four rectangular floor elements 1 together forms a frame around thequadratic floor elements 1. Guiding means 6 are foremost used for thepositioning the rectangular floor elements 1 to each other as they givethe main shape of the installation pattern. Guiding means 6 shouldhowever be used on at least every first row of quadratic floor elements1. The arrows illustrates how further floor elements 1 are joined withthe previously installed.

A floor element 1 most often includes a core covered with an upperdecorative layer 3. The core is most often comprised by wood particlesor wood fibre bonded with resin or glue. It is advantageous to surfacetreat the area around the joint if the floor is to be exposed tomoisture since the wood of the core is sensitive to moisture. Thissurface treatment may suitably include resin, wax or some kind oflacquer. It is not necessary to surface treat the joint if it is to beglued as the glue itself will protect the core from moisturepenetration. The decorative upper layer 3 is constituted by a decorativepaper impregnated with melamine formaldehyde resin. One or more layersof so-called overlay paper of α-cellulose which is impregnated melamineformaldehyde resin may possibly be placed on top of this. One or a fewof these layers may be sprinkled with hard particles of a-aluminiumoxide, silicon carbide or silicon oxide during the impregnation in orderto improve the abrasion resistance. The lower side 7 may suitably besurface treated with lacquer or a layer of paper and resin.

FIG. 7 shows, seen from above, an embodiment of the invention wherequadratic floor elements 1 according to FIG. 1 forms a so-calleddesigned installation. The quadratic floor elements 1 correspondscompletely with the ones shown in FIG. 1. The installation canaccordingly be initiated by joining quadratic floor elements 1 by meansof one or two guiding means 6 (FIG. 12) per floor element 1 so that aunit is formed. The floor elements 1 can be joined so that bothlongitudinal and latitudinal joints coincides or so that thelongitudinal and latitudinal joints are displaced by 1N meaning half ofthe floor element edge. Guiding means 6 are foremost used forpositioning the rows towards another so that the latitudinal jointscoincides over the whole floor without forming curves. It is notnecessary to use guiding means 6 on every floor element 1. Guiding means6 should, however, at least be used when joining the outer rows ofquadratic floor elements 1.

FIG. 8 shows, seen from above, an embodiment of the invention whererectangular floor elements according to FIG. 2 forms a so-calleddesigned installation. The groove 11 and tongue is for the sake ofclarity not shown. The rectangular floor elements 1 correspondscompletely with the one shown in FIG. 2. The installation canaccordingly be initiated by joining two or more floor elements to a rowby means of on or more guiding means 6 (FIG. 12) per floor element 1 sothat a unit is formed. Further rows are then added to this first row. Atleast one guiding means 6 per row is used. These should be placedclosest to the most visible pattern, which in the FIG. 8 is illustratedby a number of darker boards, comparable to a crosswalk, if only a fewguiding means 6 is used. It is however advantageous to use a full set ofguiding means 6 when installing at least the first row of floor elements1.

FIG. 9 shows, seen from above, an embodiment of the invention whererectangular floor elements 1 according to FIG. 5 forms a so-calleddesigned installation. The groove 11 and tongue is for the sake ofclarity not shown. The installation corresponds in the main with the oneillustrated in FIG. 8. The floor is however installed so that thelatitudinal joints coincides over every third row. The arrow illustrateshow next design carrying floor element 1 is joined with the previouslyinstalled ones.

FIG. 10 shows, seen from above, an embodiment of the invention whererhomboidal floor elements according to FIG. 3 forms a more advanceddesigned installation. The holes 4 (FIG. 3) are however arrangedparallel to the edge 2 which is closest to the edge 2 where the holes 4are arranged. The groove 11 and tongue is for the sake of clarity notshown. Six rhomboidal floor elements 1 with a dark design is assembledby means of guiding means 6 so that the shape of a six-pointed star isformed, a number of rhomboidal floor elements 1 with a lighter designmay then be joined around the already installed floor elements 1 bymeans of guiding means 6. Arrows illustrate how further floor elements 1are joined with the already installed ones.

FIG. 11 shows further, seen from above, an embodiment of the inventionwhere rhomboidal floor elements 1 according to FIG. 2 and hexagonalfloor elements according to FIG. 4 together forms an advanced designedinstallation. The holes 4 (FIG. 3) of the rhomboidal floor elements 1are however arranged parallel to the edge 2 which is closest to the edge2 where the holes 4 are arranged. The groove 11 and tongue is for thesake of clarity not shown. The floor elements 1 are gradually joined bymeans of guiding means 6. Arrows illustrate how further floor elements 1are joined with the previously installed.

FIG. 12 shows, in cross-section, parts of two floor elements 1 and oneguiding means 6 according to one embodiment of the invention. The floorelements 1 are provided with edges 2, a lower side 7 and a decorativeupper layer 3. The floor elements 1 are intended to be joined by meansof tongue 12 and groove 11. The floor elements 1 are at their edges 2provided with holes 4, which holes 4 extends inwards from the edge 2mainly parallel with the decorative upper layer 3. The holes arearranged on a predetermined distance from the decorative upper layer 3and on a predetermined distance from the closest corner (FIG. 1) betweentwo adjacent edges 2. The holes 4 are intended to each receive one partof a guiding means 6.

FIG. 13 shows, in cross-section, parts of two floor elements 1 and oneguiding means 6 according to another embodiment of the invention. Thefloor elements 1 are provided with edges 2, a lower side 7 and adecorative upper layer 3. The floor elements 1 are intended to be joinedby means of tongue 12 and groove 11. The floor elements 1 are at theiredges 2 provided with holes 4, which holes 4 extends inwards from theedge 2 mainly parallel with the decorative upper layer 3. The holes arearranged on a predetermined distance from the decorative upper layer 3and on a predetermined distance from the closest corner (FIG. 1) betweentwo adjacent edges 2. The holes 4 are intended to each receive one partof a guiding means 6. The holes 4 are provided with an inner grippingedge 4′ which is achieved by milling a groove 4″ from the lower side 7.See also FIG. 15. The groove 4″ is perpendicular to the hole 4 andthereby parallel to the edge 2 where the hole 4, which is intersected bythe groove 4″, is arranged. The guiding means 6 is provided with twoends 6′ each, which each are provided several resilient protrusions 60which are intended to interact with gripping edges 4′ of the holes 4during assembly.

FIG. 14 shows, in cross-section, parts of two floor elements 1 and oneguiding means 6 according to yet another embodiment of the invention.The floor elements 1 are provided with edges 2, a lower side 7 and adecorative upper layer 3. The floor elements 1 are intended to be joinedby means of tongue 12 and groove 11. The floor elements 1 are at theiredges 2 provided with holes 4, which holes 4 extends inwards from theedge 2 mainly parallel with the decorative upper layer 3. The holes arearranged on a predetermined distance from the decorative upper layer 3and on a predetermined distance from the closest corner (FIG. 1) betweentwo adjacent edges 2. The holes 4 are intended to each receive one partof a guiding means 6. The holes 4 are provided with an inner grippingedge 4′ which is achieved by milling a step with larger diameter thanthe holes 4 on a predetermined depth after the drilling. The guidingmeans 6 is provided with two ends 6′ each, which each are providedseveral resilient protrusions 60 which are intended to interact withgripping edges 4′ of the holes 4 during assembly.

FIG. 15 shows, seen from below, parts of the floor element 1 shown inFIG. 13. The holes 4 are provided with an inner gripping edge 4′ whichis achieved by milling a groove 4″ from the lower side 7. See also FIG.13. The groove 4″ is perpendicular to the hole 4 and thereby parallel tothe edge 2 where the hole 4, which is intersected by the groove 4″, isarranged.

The invention is not limited by the embodiments shown, since these canbe varied in different ways within the scope of the invention. It is forexample most advantageous to use glue when the floor elements 1 are tobe joined even when embodiments with holes 4 having gripping edges 4′and guiding means with resilient protrusions 70 are used. These areforemost used for positioning the floor elements 1 so that gaps can beavoided and that a designed installation can be achieved by the one notskilled in the art without any need of special tools.

Floor elements 1 most often also includes a core covered with an upperdecorative layer 3. The core is most often comprised by wood particlesor wood fibre bonded with resin or glue. It is advantageous to surfacetreat the area around the joint if the floor is to be exposed tomoisture since the wood of the core is sensitive to moisture. Thissurface treatment may suitably include resin, wax or some kind oflacquer. It is not necessary to surface treat the joint if it is to beglued as the glue itself will protect the core from moisturepenetration. The decorative upper layer 3 is constituted by a decorativepaper impregnated with melamine formaldehyde resin. One or more layersof so-called overlay paper of α-cellulose which is impregnated melamineformaldehyde resin may possibly be placed on top of this. One or a fewof these layers may be sprinkled with hard particles of a-aluminiumoxide, silicon carbide or silicon oxide during the impregnation in orderto improve the abrasion resistance. The lower side 7 may suitably besurface treated with lacquer or a layer of paper and resin.

What is claimed is:
 1. Floor element, which is mainly in the form of aboard with triangular, quadratic, rectangular, rhomboidal or polygonalshape as seen from above, which floor element is provided with edges, alower side and a decorative upper layer, and two or more floor elementsintended to be joined via tongue and groove characterized, in that saidfloor element at all edges are provided with holes, which holes extendinwards from the edge mainly parallel to the decorative upper layer,that the holes are arranged at a predetermined distance from thedecorative upper layer and at a predetermined distance from the closestcorner between two adjacent edges, said holes being intended to eachreceive one part of a guiding means, whereby a) said floor element hasfour edges having the same length and each edge being provided with agroup of holes, said group of holes being arranged at a mutual distanceof N and with a distance of N/2 between said holes and a closest cornerbetween two adjoining edges, whereby the edge as a length of 2N, or b)said floor element has two opposite edges having a length greater thanremaining two edges, each shorter edge being provided with a group oftwo holes, which holes in each group of holes are arranged at a mutualdistance of N and with a distance of N/2 between said holes and aclosest corner between two adjoining edges, each longer edge beingprovided with a group of three or more holes of which the outermostholes are arranged at a distance of L/2 from respective closest cornerbetween two adjoining edges, the distance between two adjacent holes,arranged on the longer edges, being L, 2L, 3L, 4L, 5L or a combinationthereof, each long edge having a length being greater than 3L, L beingequal to N; wherein said holes are provided with an inner gripping edgeand extend parallel to the edge joining closest to the edge at which theholes are arranged, and said inner gripping edge intersecting a lowerside groove, which lower side groove is substantially perpendicular tothe hole and thereby substantially parallel to the edge at which thehole, being intersected by the lower side groove, is arranged.
 2. Floorelement according to claim 1, characterized in that said holes extendperpendicularly from the edge at which said holes are arranged.
 3. Floorelement according to claim 1, characterized in that said holes areprovided with an inner gripping edge obtained by milling a step havinglarger diameter on a predetermined depth after having drilled the hole.4. Flooring comprising in combination: at least one floor elementaccording to claim 1, and at least one guiding means, wherein eachguiding means has two ends, each end being provided with one or moreresilient projections which during assembly are intended to intersectwith the gripping edges of the holes.
 5. Flooring according to claim 4,further comprising glue on the at least one floor element.
 6. Floorelement according to claim 1, wherein the edges defining the holescomprise a surface treatment.
 7. Floor element according to claim 6,wherein the surface treatment comprises at least one material selectedfrom the group consisting of resin, wax and lacquer.
 8. Floor elementaccording to claim 1, wherein the each long edge has a length greaterthan 30L.
 9. A kit comprising: at least one floor element according toclaim 1, and at least one guiding means, wherein each guiding means hastwo ends, each end being provided with one or more resilient projectionswhich during assembly are intended to intersect with the gripping edgesof the holes.
 10. Floor element according to claim 1, wherein the lowerside groove intersects the lower side.
 11. Floor element according toclaim 1, characterized in that said lower side grooves are obtained bymilling from the lower side.
 12. Flooring element according to claim 11,wherein said holes are obtained by milling a step having larger diameteron a predetermined depth after having drilled the hole.
 13. Flooringelement according to claim 11, wherein said holes comprise a firstsection having a first cross-section and a second section having asecond cross-section, wherein the first section is closer to the lowerside and the first cross-section is smaller than the secondcross-section, when viewed transverse to the edge of the flooringelement, thus forming the inner gripping edge.
 14. Floor elementaccording to claim 11, wherein the each long edge has a length greaterthan 30L.
 15. Floor element, which is mainly in the form of a board withtriangular, quadratic, rectangular, rhomboidal or polygonal shape asseen from above, which floor element is provided with edges, a lowerside and a decorative upper layer, and two or more floor elementsintended to be joined via tongue and groove characterized in that saidfloor element at all edges are provided with holes, which holes extendinwards from the edge mainly parallel to the decorative upper layer,that the holes are arranged at a predetermined distance from thedecorative upper layer and at a predetermined distance from the closestcorner between two adjacent edges, said holes being intended to eachreceive one part of a guiding means, whereby a) said floor element hasfour edges having the same length and each edge being provided with agroup of holes, said group of holes being arranged at a mutual distanceof N and with a distance of N/2 between said holes and a closest cornerbetween two adjoining edges, whereby the edge as a length of 2N, or b)said floor element has two opposite edges having a length greater thanremaining two edges, each shorter edge being provided with a group oftwo holes, which holes in each group of holes are arranged at a mutualdistance of N and with a distance of N/2between said holes and a closestcorner between two adjoining edges, each longer edge being provided witha group of three or more holes of which the outermost holes are arrangedat a distance of L/2 from respective closest corner between twoadjoining edges, the distance between two adjacent holes, arranged onthe longer edges, being L, 2L, 3L, 4L, 5L or a combination thereof, eachlong edge having a length being greater than 3L, L being equal to N;wherein said holes are provided with an inner gripping edge and extendparallel to the edge to the edge at which the holes are arranged,characterized in that said holes are provided with an inner grippingedge obtained by milling a groove from the lower side, which groove isperpendicular to the hole and thereby parallel to the edge at which thehole, being intersected by the groove, is arranged.
 16. Floor element,having a polygonal shape as seen from above, which floor element isprovided with edges, a lower side, a core formed from wood particles orwood fibre, and a decorative upper layer, and two or more floor elementsintended to be joined via tongue and groove characterized in that saidfloor element at all edges is provided with holes, which holes extendinwards from the edge mainly parallel to the decorative upper layer,that the holes are arranged at a predetermined distance from thedecorative upper layer and at a predetermined distance from the closestcorner between two adjacent edges, said holes being intended to eachreceive one part of a guiding means, whereby a) said floor element hasfour edges having the same length and each edge being provided with agroup of holes, said group of holes being arranged at a mutual distanceof N and with a distance of N/2 between said holes and a closest cornerbetween two adjoining edges, whereby the edge as a length of 2N, or b)said floor element has two opposite edges having a length greater thanremaining two edges, each shorter edge being provided with a group oftwo holes, which holes in each group of holes are arranged at a mutualdistance of N and with a distance of N/2 between said holes and aclosest corner between two adjoining edges, each longer edge beingprovided with a group of three or more holes of which the outermostholes are arranged at a distance of L/2 from respective closest cornerbetween two adjoining edges, the distance between two adjacent holes,arranged on the longer edges, being L, 2L, 3L, 4L, 5L or a combinationthereof, each long edge having a length being greater than 3L, L beingequal to N; wherein said holes are surrounded by the core of the boardprovided with an inner gripping edge.